A GStreamer application running on the end receives control information using the PCIe BAR map memory and data through the QDMA. An appsrc plug-in, part of the GStreamer application, receives data from the host and passes it to the filter2d plug-in, which processes the data with the help of a filter accelerated in the PL. The appsync plug-in receives the data back from the filter2d plug-in and sends it back to the host.
The PCIe BAR map address space is used to transfer control information between the host and the endpoint. Details on how the control information is interpreted between the x86 host and the target is shown in the following figure.
Data is transferred between the host and the target using the QDMA. QDMA device drivers are installed on the host, and are used to configure the QDMA IP on the endpoint to initiate data transfer from the host.
The host reads the media file from the disk, sends control information to the endpoint, and initiates the DMA transfer to send the media file to the endpoint. After receiving filtered output back from the endpoint, the data is displayed on the host monitor.
At the target side, the OpenCL-based application is used to receive the data, filter it, and send the data back to the host. The filter 2d plug-in uses the XRT layer to create buffers and to interact with the 2D filter IP created using the Vitis™ flow in the PL.